Installation – American Magnetics 05500PS-430-601 High Stability Integrated Power Supply System User Manual
Page 42
24
Rev.
5
Installation
Power-Up Procedure
9. Set the target current to 10 A. Refer to sections 3.3 on page 31 and
10. If a Persistent Switch is installed, set the PSw P/S Ramp Rate to 10
A/sec. Refer to paragraph 3.10.2.11 on page 62
11. Initiate ramping to the target current by pressing the
RAMP /
PAUSE
key (status indicator changes from
P
to ).
12. The system should ramp to 10 A in approximately 10 seconds.
Verify this is the case (if a PSwitch is installed and in the cooled
state, ramp time to 10 A should be slightly less than 2 seconds).
Note
With an energy absorber unit is connected, the Model 430
Programmer may take significantly longer to ramp the current to 10
A. The Model 430 must first develop a supply output voltage to
overcome the forward voltage drop of a connected energy absorber.
During actual magnet operation, the presence of an energy absorber
will not significantly delay the ramping operation since the Model
430 control gain is increased by orders of magnitude when an
inductive load is connected (unless stability setting is 100%).
13. When the target current is achieved, the
FIELD AT TARGET
LED
will be illuminated. The display should show “
+10.00 A -
”
indicating that the Model 430 Programmer is in the holding mode
at the target current value (+10.00 A).
Note
There may be a discrepancy between the current shown on the power
supply display
1
and the current displayed on the Model 430
Programmer. The current measurement system incorporated in the
Model 430 is more accurate than the power supply shunt.
14. Verify that the power supply output current displays indicate that
a total of approximately 10 A is being supplied to the load (which is
only the cabling in this case).
15. Set the target current to the Current Limit value. Refer to section
3.10.2.4 on page 58 to determine the Current Limit value. After the
new target current value is entered, the Model 430 Programmer
should ramp automatically to the new setting.
16. When the new target current value is reached, the power supply
current display (if provided) should also indicate the new value.
1. Not all power supplies have a local current readout.